The reason why the detectives mention that they need the dress, following up on the story, is: for an evening out.
Within the story, the detectives spend all day touring the city in order to identify some clues that would be useful to solve the mystery they have been investigating, while tying up all the loose ends within the testimonies.
In one of their clues, they identify that in a celebration that will take place at night, they will be able to obtain more information from some of the suspects, for which they decide to investigate all the guidelines that they require to be able to attend and go unnoticed.
Within what is required, there is a particular dress that the girl can wear, which could allow her to go out and attend the party without being recognized, for which they decide to obtain it at all costs and thus solve the mystery.
More information about Story of Jake and Summer: https://brainly.com/question/12559857
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